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18574 Jeansimon (1997 WO23)
Classification: Main-belt Asteroid          SPK-ID: 2018574
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299167313344685 3.4698e-08  
a 2.750737825250248 9.9937e-09 au
q 2.393370958235651 9.5937e-08 au
i 7.650604765129278 3.6238e-06 deg
node 111.7140413800957 2.9215e-05 deg
peri 51.84681782207945 3.2876e-05 deg
M 344.1409548575967 1.4823e-05 deg
tp 2459273.908569410153
(2021-Feb-28.40856941)
6.8714e-05 TDB
period 1666.373022483891
4.56
9.0811e-06
2.486e-08
d
yr
n .2160380629922734 1.1773e-09 deg/d
Q 3.108104692264844 1.1292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1475  
   data-arc span      10752 days (29.44 yr)  
   first obs. used      1991-10-16  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51232  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:45:02  

Additional Information
 Earth MOID = 1.41062 au 
 Jupiter MOID = 1.90127 au 
 T_jup = 3.321 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.62   n/a MPCxxxxx  
rotation period rot_per 11.055 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

18574 Jeansimon           Discovered 1997 Nov. 28 by the OCA-DLR Asteroid Survey at Caussols.
Jean-Louis Simon (b. 1940) works at the Paris Institut de Mécanique Céleste on analytical planetary theory. He produced the first values of the secular variation of the orbital semimajor axes of the planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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